Tutorial 04

 ------------1D.cpp

#include <iostream>

#include <string>

using namespace std;

int main()

{

    int arr [5] = {1, 3, 5, 7, 9};

cout<<"The array elements are: \n";

for (int i = 0; i < 5; i++)

{ 

    cout << arr[i] << " ";

}

cout << "\n";

int sum = 0, avg = 0;

  int num [10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} ;

  for (int i = 0; i < 10; i++ )

  {

      sum = sum + num [i] ;

  }

  cout << "Sum of all elements is: " << sum ;

  avg = sum / 10 ;

  cout << "\n Average is: " << avg ;

    return 0;

}

  ------------2D.cpp

// C++ Program to implement Jagged Array 

// 1st way: static arrays 

#include <iostream> 

using namespace std; 

int main() 

{ 

// create 3 row arrays having different sizes 

// ( no ofcolumns) 

int row1[] = { 1, 2, 3, 4 }; 

int row2[] = { 5, 6 }; 

int row3[] = { 7, 8, 9 }; 

// storing base address of each row array 

int* jagged[] = { row1, row2, row3 }; 

int sizes[] = { 4, 2, 3 }; 

cout << "elements in matrix form as follow" << endl; 

for (int i = 0; i < 3; i++) { 

// getting current(ith) row 

int* ptr = jagged[i]; 

for (int j = 0; j < sizes[i]; j++) { 

// for ith row having sizes[i] no. of 

// columns 

cout << *(ptr + j) << " "; 

// *ptr have base address 

// adding j means access jth 

// element for particular(ith) row 

} 

cout << endl; 

} 

return 0; 

}

 ------------1D_Dynamic.cpp

#include <iostream>

#include <string>

using namespace std;

int main() {

    int* arr = new int[5]{1, 3, 5, 7, 9};

   cout << "The array elements are: \n";

    for (int i = 0; i < 5; i++) {

        cout << arr[i] << " ";

    }

  cout << "\n";

    delete[] arr;

    int sum = 0, avg = 0;

    int* num = new int[10]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

    for (int i = 0; i < 10; i++) {

        sum = sum + num[i];

    }

    cout << "Sum of all elements is: " << sum;

    avg = sum / 10;

    cout << "\nAverage is: " << avg;

    delete[] num;

    return 0;

}

 ------------2D_Dynamic.cpp

#include <iostream>

int main() {

    int **arr = new int*[5];

    for (int i = 0; i < 5; ++i) 

    {

        arr[i] = new int[5];

    }

    std::cout << "Enter 2D array elements (5x5):\n";

    for (int i = 0; i < 5; ++i)

     {

        for (int j = 0; j < 5; ++j)

         {

            std::cin >> arr[i][j];

        }

    }

    std::cout << "The array elements are: \n";

    for (int i = 0; i < 5; ++i)

     {

        for (int j = 0; j < 5; ++j)

         {

            std::cout << arr[i][j] << " ";

        }

        std::cout << "\n";

    }

    // Free memory

    for (int i = 0; i < 5; ++i) 

    {

        delete[] arr[i];

    }

    delete[] arr;

    return 0;

}